I build my own elevated blinds. I'm down in zone 7a so heat is more of an issue than cold. Here is an example:
Back to your situation. One year I was working on one in the summer and something came up and I did not complete it by fall. I only had the platform built. So, that year, I simply put a popup blind on the platform. I'm a fairly big guy and I've always found popup blinds a but more restrictive. Also, you don't get the advantage of having a nice shelf to steady a rifle for longer shots that I get with my permanent box blinds.
I setup like yours is much more mobile. If you don't like the setup, you can move it. I can't practically do that with my permanent blinds. So, I generally start with a popup blind on the ground. You can't put one up and immediately hunt it for turkey with no problem. Deer, on the other hand, take time to acclimate to a blind, so I leave mine in place 24/7/365. I found they don't weather well when used this way. They only last a few years. Once I've confirmed that I like the location, I build my permanent box blinds.
So, you will probably have to compromise between deer acclimation and blind weathering. If you are only rifle hunting it with shots generally beyond 50 yards, deer acclimation may be less of an issue. If you plan to hunt with a bow, crossbow, or traditional muzzleloader, it will come into play.
What you have is clearly a workable solution depending on your situation.